abstract：:Electroantennogram (EAG) responses to the aphid sex pheromone components, (1R,4aS,7S,7aR)-nepetalactol and (4aS,7S,7aR)-nepetalactone, and a plant volatile, (E)-2-hexenal, were investigated at three different positions (5/6th, 4/5th and 3/4th inter-segmental regions) along the antennae of four different morphs in two ...

journal_title：Journal of insect physiology

authors： Park KC,Hardie J

更新日期：2002-05-01 00:00:00

abstract：:In a Japanese population of Locusta migratoria, adult females become reproductively inactive under crowding and long days (LD) and reproductively active under crowding and short days (SD). The identity and titre of ecdysteroids in the haemolymph and ovaries from adult females reared under SD and LD were investigated b...

journal_title：Journal of insect physiology

authors： Tawfik AI,Tanaka Y,Tanaka S

更新日期：2002-04-01 00:00:00

abstract：:In comparison to insects and Crustacea, our knowledge of the predominant hemolymph proteins in ticks is minimal. The hemolymph protein most studied in ticks has been vitellogenin (Vg). Vg is synthesized by the tick fat body after female adults obtain a blood meal, is released into the hemolymph and is absorbed by deve...

journal_title：Journal of insect physiology

authors： Gudderra NP,Sonenshine DE,Apperson CS,Roe RM

更新日期：2002-03-01 00:00:00

abstract：:Analysis of extracts of hemolymph obtained from sexually mature alate females of Solenopsis invicta from monogyne colonies resulted in identification of juvenile hormone III (JH III). The average amount of JH III was 0.32+/-0.04 pmol/&mgr;molof hemolymph. Topical application of 0.038 pmol of JH III was sufficient to s...

journal_title：Journal of insect physiology

authors： Burns SN,Teal PE,Vander Meer RK,Nation JL,Vogt JT

更新日期：2002-03-01 00:00:00

abstract：:Midgut extracts from Aedes aegypti females exhibited hydrolytic activities against synthetic substrates for carboxypeptidase A, carboxyopeptidase B and leucine-aminopeptidase. The three activities showed a broad pH optimum, with maximum activities at pH between 6.5 and 8.5. Enzymatic activities were further characteri...

journal_title：Journal of insect physiology

authors： Noriega FG,Edgar KA,Bechet R,Wells MA

更新日期：2002-02-01 00:00:00

abstract：:The effect of plant nitrogen (N) status on the content and distribution of free amino acids in the bodies and honeydew of silverleaf whiteflies Bemisia tabaci (Gennadius) Biotype B (= B. argentifolii Bellows and Perring) was determined. Whiteflies fed for 4 days on cotton leaves that received high or low N fertility. ...

journal_title：Journal of insect physiology

authors： Crafts-Brandner SJ

更新日期：2002-01-01 00:00:00

abstract：:We have examined the relative sensitivity of Aedes albopictus C7-10 mosquito cells to irradiation with ultraviolet light from a germicidal lamp. On the basis of plating efficiency, C7-10 cells were approximately two times more resistant to UV light than human 293 leukemia cells. Recovery after UV irradiation was accom...

journal_title：Journal of insect physiology

authors： Jayachandran G,Fallon AM

更新日期：2002-01-01 00:00:00

abstract：:The spectral sensitivity of the pit organ of the beetle Melanophila acuminata (Coleoptera:Buprestidae) was measured using an ultrafast tunable infrared laser source and standard electrophysiological techniques. The pit organ may be classified as a broadband detector as the beetles responded to all infrared excitation ...

journal_title：Journal of insect physiology

authors： Hammer DX,Seigert J,Stone MO,Rylander HG,Welch AJ

更新日期：2001-12-01 00:00:00

abstract：:Zabrotes subfasciatus larvae possess three alpha-amylase isoforms determined by in gel assays following SDS-PAGE. Two minor isoforms present lower electrophoretic mobility than the major form. When developed inside Vigna unguiculata (cowpea) seeds, fourth instar larvae have minor quantities of the slow-migrating isofo...

journal_title：Journal of insect physiology

authors： Silva CP,Terra WR,de Sá MF,Samuels RI,Isejima EM,Bifano TD,Almeida JS

更新日期：2001-11-01 00:00:00

abstract：:Experiments were performed on adult wild Anastrepha obliqua females to (I) determine whether there is a critical period during the reproductive phase when the absence of protein in the diet impairs egg production; (II) determine whether the females are able to self-select an optimal diet; and (III) determine the discr...

journal_title：Journal of insect physiology

authors： Cresoni-Pereira C,Zucoloto FS

更新日期：2001-09-01 00:00:00

abstract：:A population of the fruit fly Drosophila melanogaster was raised in periodic light/dark (LD) cycles of 12:12 h for about 35 generations. Eclosion, locomotor activity, and oviposition were found to be rhythmic in these flies, when assayed in constant laboratory conditions where the light intensity, temperature, humidit...

journal_title：Journal of insect physiology

authors： Sheeba V,Chandrashekaran MK,Joshi A,Kumar Sharma V

更新日期：2001-09-01 00:00:00

abstract：:Oocyte counts, used as a measure of egg load, were compared among three different age groups (15, 30 and 45 days) of two polyphagous species of tephritid fruit flies, Anastrepha ludens and Anastrepha obliqua, which were exposed to varying conditions of diet (sucrose vs sucrose and protein), availability of oviposition...

journal_title：Journal of insect physiology

authors： Aluja M,Díaz-Fleischer F,Papaj DR,Lagunes G,Sivinski J

更新日期：2001-09-01 00:00:00

abstract：:Fourteen naturally occurring sugars were individually tested with respect to their effect on Cotesia glomerata longevity. Parasitoids kept with solutions of either sucrose, glucose and fructose lived for >30 days. This constitutes a factor 15 increase in life span in comparison to control individuals kept with water o...

journal_title：Journal of insect physiology

authors： Wäckers FL

更新日期：2001-09-01 00:00:00

abstract：:The quantity and composition of the six major mandibular gland components of young queenless workers of the Cape honeybee (Apis mellifera capensis) were determined. The total amount of the six components increased with age. The relative quantities in the mandibular gland secretion of queenless caged workers were found...

journal_title：Journal of insect physiology

authors： Simon UE,Moritz RF,Crewe RM

更新日期：2001-07-01 00:00:00

abstract：:The male fruitfly, Drosophila melanogaster, transfers to his mate proteins that increase his reproductive success by causing changes in her behavior and physiology. Here we show that among the transferred proteins are ones with antibacterial activity. We performed Escherichia coli overlay assays of native PAGE or rena...

journal_title：Journal of insect physiology

authors： Lung O,Kuo L,Wolfner MF

更新日期：2001-06-01 00:00:00

abstract：:The intracellular elemental concentrations of K, Na, Cl, P, Mg and Ca within Type I cells of the Malpighian tubules of Locusta migratoria have been measured using electron probe X-ray microanalysis. The distribution of Na, K and Cl was not homogeneous within the cells and concentration gradients exist from basal to ap...

journal_title：Journal of insect physiology

authors： Hopkin R,Anstee JH,Bowler K

更新日期：2001-04-01 00:00:00

abstract：:Electrophysiological studies on female An. gambiae s.s. mosquitoes revealed a receptor neuron within a subpopulation of the antennal grooved-peg sensilla sensitive to the odour of incubated sweat, but not responding to fresh sweat. This receptor neuron was sensitive to ammonia as well, a sweat-borne component which at...

journal_title：Journal of insect physiology

authors： Meijerink J,Braks MA,Van Loon JJ

更新日期：2001-04-01 00:00:00

abstract：:Lepidopteran males produce eupyrene (nucleate) and apyrene (anucleate) spermatozoa, but in the female only eupyrene spermatozoa leave the spermatheca and fertilize the eggs. Both kinds of spermatozoa lack intrinsic motility in the male genital duct. They become motile in the spermatophore, in a process involving prote...

journal_title：Journal of insect physiology

authors： Friedländer M,Jeshtadi A,Reynolds SE

更新日期：2001-03-01 00:00:00

abstract：:Catabolism of excess dietary protein by Aedes aegypti was investigated during larval development, during and after metamorphosis. Activity profiles were established for xanthine dehydrogenase (XDH, uricotelic pathway) and arginase (ureotelic pathway). Both enzymes are active at all times during the life-cycle. During ...

journal_title：Journal of insect physiology

authors： von Dungern P,Briegel H

更新日期：2001-02-01 00:00:00

abstract：:The effects of deprivation of oviposition substrate on food consumption and egg production were compared between the long-winged (LW) and the short-winged (SW) morph of a cricket, Modicogryllus confirmatus, to determine how suppressed oviposition activity would influence these traits in each wing morph. Food consumpti...

journal_title：Journal of insect physiology

authors： Tanaka S

更新日期：2001-01-01 00:00:00

abstract：:Simultaneous extracellular recordings from both locust abdominal connectives show a differential activation of both bilateral homologues of an identified long projection interneuron (A4I1) in response to wind stimuli from different directions. Despite the previously shown extensive structural dynamics of sensory affer...

journal_title：Journal of insect physiology

authors： Bucher D,Pflüger H

更新日期：2000-12-01 00:00:00

abstract：:The diuretic activity of the helicokinins I (YFSPWG-amide), II (VRFSPWG-amide) and III (KVKFSAWG-amide) was tested on Heliothis virescens larvae. All three kinins increased fluid secretion in isolated Malpighian tubules in a dose-dependent manner. Injections into the haemolymph caused a significant reduction in weight...

journal_title：Journal of insect physiology

authors： Seinsche A,Dyker H,Lösel P,Backhaus D,Scherkenbeck J

更新日期：2000-11-01 00:00:00

abstract：:We studied behavioral responses of the cricket, Gryllus bimaculatus, to mechanical stimulation of the hindwing tip using three different kinds of stimuli: touching, bending and pinching. The most characteristic was a sequence of initial jump-like movements and subsequent running steps, that is referred to as escape be...

journal_title：Journal of insect physiology

authors： Hiraguchi T,Yamaguchi T

更新日期：2000-10-01 00:00:00

abstract：:In mosquito larvae, the peritrophic matrix (PM) separates the gut contents from the intestinal epithelium. This report describes a new in vivo assay for estimating PM permeability. The assay also allows for assessment of the permeability of the caecal membrane, a structure that separates each caecum from the gut lumen...

journal_title：Journal of insect physiology

authors： Edwards MJ,Jacobs-Lorena M

更新日期：2000-09-01 00:00:00

abstract：:Nine neuropeptides isolated from Drosophila melanogaster and five neuropeptides, previously isolated from the CNS of Limulus with antisera to FMRFamide-related peptides, were tested for their effects on the myogenic heart of Drosophila melanogaster. Of the native peptides, TDVDHVFLRF-NH(2) (Dromyosuppressin), DPKQDFMR...

journal_title：Journal of insect physiology

authors： Johnson E,Ringo J,Dowse H

更新日期：2000-08-01 00:00:00

abstract：:The presence of two spectral mechanisms, near-ultraviolet and green (lambda(max)=545nm), is strongly suggested by electroretinographic visual spectral sensitivity curves obtained under dark and red chromatic adaptation conditions in the compound eyes of the click beetle Pyrophorus punctatissimus. The bioluminescence e...

journal_title：Journal of insect physiology

authors： Lall AB,Ventura DS,Bechara EJ,de Souza JM,Colepicolo-Neto P,Viviani VR

更新日期：2000-07-01 00:00:00

abstract：:The last-instar larvae of a drosophilid fly, Chymomyza costata enter diapause in response to the dark-phases longer than 9 h (Yoshida, T., Kimura, M.T., 1995. The photoperiodic clock in Chymomyza costata. Journal of Insect Physiology 41, 217-222). In order to switch the developmental programming of the sensitive larva...

journal_title：Journal of insect physiology

authors： Kost'ál V V,Noguchi H,Shimada K,Hayakawa Y

更新日期：2000-06-01 00:00:00

abstract：:Studies were undertaken to investigate vitellogenesis and its regulation in female adults of the fall armyworm, Spodoptera frugiperda. A single female-specific protein, likely to be the S. frugiperda vitellogenin (Vg), appeared approximately 5 h after adult eclosion in the hemolymph of virgin females. The concentratio...

journal_title：Journal of insect physiology

authors： Sorge D,Nauen R,Range S,Hoffmann KH

更新日期：2000-06-01 00:00:00

abstract：:Resting potentials in Apis mellifera and Drosophila melanogaster flight muscles decrease with falling temperatures. When resting potentials fall to between -37 and -45 mV they activate a final burst of spontaneous muscle action potentials (MAPs). This final burst of MAPs marks the beginning of chill-coma for each spec...

journal_title：Journal of insect physiology

authors： Hosler JS,Burns JE,Esch HE

更新日期：2000-05-01 00:00:00

abstract：:To improve the efficiency of the ladybeetle Harmonia axyridis as a biological control agent against aphids, a flightless population was produced by feeding adults with a mutagen and selecting their progeny for non-flying but otherwise morphologically normal individuals. The inability to fly could result from a change ...

journal_title：Journal of insect physiology

authors： Tourniaire R,Ferran A,Gambier J,Giuge L,Bouffault F

更新日期：2000-05-01 00:00:00

abstract：:The biogenic amine octopamine and the pentapeptide proctolin are two important neuroactive chemicals that control contraction of the oviducts of the African locust Locusta migratoria. The physiological responses and signal transduction pathways used by octopamine and proctolin have been well characterized in the locus...

journal_title：Journal of insect physiology

authors： Nykamp DA,Lange AB

更新日期：2000-05-01 00:00:00

abstract：:Diapetimorpha introita is an ichneumonid ectoparasitoid of the fall armyworm, Spodoptera frugiperda. Since it has been reported that D. introita wasps reared on an artificial diet exhibit a significantly lower percentage of adult eclosion and fecundity than host-reared wasps, this study was undertaken to elucidate the...

journal_title：Journal of insect physiology

authors： Gelman DB,Carpenter JE,Greany PD

更新日期：2000-04-01 00:00:00

abstract：:Fifth instar larvae and prepupae of Heliothis virescens (tobacco budworm) were injected with live Enterobacter cloacae and bled at different times after vaccination. Immune pupal hemolymph showed a 54 times increase in lysozyme activity when compared with normal larval hemolymph, and an 11 times increase of lysozyme a...

journal_title：Journal of insect physiology

authors： Chung KT,Ourth DD

更新日期：2000-04-01 00:00:00

abstract：:The action of juvenile hormone (JH) and JH mimics have been examined in vitro by utilizing the imaginal disc-derived cell line, IAL-PID2. We have discovered that the cell line was responsive to JH and a variety of JH mimics. The most consistent response obtained in our studies was inhibition of cell proliferation, in ...

journal_title：Journal of insect physiology

authors： Oberlander H,Leach CE,Shaaya E

更新日期：2000-03-01 00:00:00

abstract：:Pemphigus bursarius (L.) is a host alternating root-feeding aphid with a proportion of the population overwintering as asexual hiemalis in the soil. These hiemalis must be sufficiently cold tolerant to survive at the temperatures they would experience in winter, and also be able to overcome a period of prolonged starv...

journal_title：Journal of insect physiology

authors： Phillips SW,Bale JS,Tatchell GM

更新日期：2000-03-01 00:00:00

abstract：:We investigated pathogenesis of Autographa californica M Nucleopolyhedrovirus in the semipermissive host, Manduca sexta, using a lacZ recombinant virus (AcMNPV-hsp70/lacZ) to track the temporal progression of infection. Results from time course studies monitoring infections initiated orally in fourth instars demonstra...

journal_title：Journal of insect physiology

authors： Washburn JO,Haas-Stapleton EJ,Tan FF,Beckage NE,Volkman LE

更新日期：2000-02-01 00:00:00

abstract：:The oviposition of female locusts is a complex behaviour that includes a dramatic extension of the abdomen. The role of internal pressure during oviposition was investigated by monitoring the intra-tracheal pressure and the activity of selected longitudinal muscles, while movements of the abdomen were visualised with ...

journal_title：Journal of insect physiology

authors： Rose U,Seebohm G,Hustert R

更新日期：2000-01-01 00:00:00

abstract：:Uvarov's theory of locust phase polymorphism implies a differential phase-specific gene expression. It was the goal of the present investigation to provide data on the molecular level for this concept. We used the technique of 2D gel electrophoresis to generate haemolymph polypeptide maps from mature locust males. Und...

journal_title：Journal of insect physiology

authors： Wedekind-Hirschberger S,Sickold S,Dorn A

更新日期：1999-12-01 00:00:00

abstract：:The behaviour of those polistine wasps which found their nests by swarming, suggests that these species use trail pheromones for leading the swarm to the location chosen for the new nest. Apart from a recent report regarding the ropalidine Polybioides tabidus, where the pheromone is thought to originate from the Dufou...

journal_title：Journal of insect physiology

authors： Clarke SR,Dani FR,Jones GR,Morgan ED,Turillazzib S

更新日期：1999-10-01 00:00:00

abstract：:The development of genetically modified vectors refractory to parasites is seen as a promising strategy in the future control of endemic diseases such as malaria. Nevertheless, knowledge of mosquito embryogenesis, a pre-requisite to the establishment of transgenic individuals, has been presently neglected. We have her...

journal_title：Journal of insect physiology

authors： Valle D,Monnerat AT,Soares MJ,Rosa-Freitas MG,Pelajo-Machado M,Vale BS,Lenzi HL,Galler R,Lima JB

更新日期：1999-08-01 00:00:00